Jonas, 16, who has placed his entire future on becoming a professional tennis player, fails his final exams at school and finds out he hasn't been chosen for the national tennis team. He gets consoled by his girlfriend, Delphine. To avoid sending him to technical training school, his mother, consumed by her own activities, entrusts Jonas to Pierre, a confirmed 30-year-old bachelor who, with the help of a couple of friends, tutors Jonas in several subjects so he can become a "free student."
However, gradually, the three adults include Jonas' sexual emancipation in their teaching mission. The teen discovers that, though he agrees in principle to the theories promoted by the men, the practical application doesn't sit well with him.